<mat-nav-list dense>
  <h3 matSubheader>项目</h3>
  <mat-list-item>
    <mat-icon matListIcon
              svgIcon="projects"></mat-icon>
    <span matLine>项目首页</span>
    <span matLine
          matSubheader>查看您的所有项目</span>
  </mat-list-item>
  <h3 matSubheader>日历</h3>
  <mat-list-item>
    <mat-icon matListIcon
              svgIcon="month"></mat-icon>
    <span matLine>月视图</span>
    <span matLine
          matSubheader>按月查看您任务</span>
  </mat-list-item>
  <mat-list-item>
    <mat-icon matListIcon
              svgIcon="week"></mat-icon>
    <span matLine>周视图</span>
    <span matLine
          matSubheader>按周查看您任务</span>
  </mat-list-item>
  <mat-list-item>
    <mat-icon matListIcon
              svgIcon="day"></mat-icon>
    <span matLine>日视图</span>
    <span matLine
          matSubheader>按日查看您任务</span>
  </mat-list-item>
</mat-nav-list>
